25381161 has 32 divisors (see below), whose sum is σ = 40830720. Its totient is φ = 15489792.

The previous prime is 25381129. The next prime is 25381171. The reversal of 25381161 is 16118352.

It is not a de Polignac number, because 25381161 - 2⁵ = 25381129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25381171) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58401 + ... + 58833.

It is an arithmetic number, because the mean of its divisors is an integer number (1275960).

Almost surely, 2^25381161 is an apocalyptic number.

It is an amenable number.

25381161 is a deficient number, since it is larger than the sum of its proper divisors (15449559).

25381161 is a wasteful number, since it uses less digits than its factorization.

25381161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 616 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 25381161 is about 5037.9719133794. The cubic root of 25381161 is about 293.8803136317.

The spelling of 25381161 in words is "twenty-five million, three hundred eighty-one thousand, one hundred sixty-one".